Poster images (or Featured images) in ReadyCMS are managed by using the Featured Image widget.
The Poster image is another pre-built feature that can be used by your custom content.
Every content page can have its own poster image. Adding poster images to your product pages can help advertise the said products - poster image is the image that will be displayed along with the product in the searches.
The featured image widget allows you to upload the image, enter the image URL, or even seek help finding appropriate available photos of your product.
Poster image is also used for generating the meta tag for image url.
In this part of the documentation we will talk about:
If you are interested in having multiple images of the same product, learn about content galleries.